Table 1.

Comparison of membrane electrical properties of layer V pyramidal neurons of the PL cortex recorded intracellularly from chronic cocaine- and saline-treated/control rats

	Saline/control group		Cocaine-treated group
	Mean	SEM	Mean	SEM	pa
RMP (mV)	−65.9	0.3	−62.3	1.2	<0.01
Rm (MΩ)	80.3	2.8	87.0	3.3	<0.05
τ (ms)	6.7	0.2	7.4	0.2	<0.01
n	111		109

RMP, Resting membrane potential; R_m, membrane resistance; τ, membrane time constant.

^aWald-Wolfowltz test.